460 Scania

460 Scania (/ˈskeɪiə/; prov. designation: A900 UF or 1900 FN) is a background asteroid and a slow rotator from the central regions of the asteroid belt. It was discovered by German astronomer Max Wolf at the Heidelberg-Königstuhl State Observatory on 22 October 1900.[1] The uncommon K-type asteroid has an exceptionally long rotation period of 164.1 hours and measures approximately 21 kilometers (13 miles) in diameter. It was named after the Swedish region of Scania, where a meeting was held by the Astronomische Gesellschaft in 1904.[2]

460 Scania
Discovery [1]
Discovered byM. F. Wolf
Discovery siteHeidelberg Obs.
Discovery date22 October 1900
Designations
(460) Scania
Pronunciation/ˈskeɪiə/
Named after
Scania (Skåne)
(Province of Sweden)[2]
A900 UF · 1900 FN
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc119.27 yr (43,564 d)
Aphelion3.0059 AU
Perihelion2.4304 AU
2.7182 AU
Eccentricity0.1059
4.48 yr (1,637 d)
266.57°
0° 13m 11.64s / day
Inclination4.6346°
205.20°
161.66°
Physical characteristics
Mean diameter
  • 19.689±0.146 km[6]
  • 21.78±1.9 km[7]
  • 23.58±0.51 km[8]
164.1±0.1 h[9]
  • 0.189±0.009[8]
  • 0.2144±0.042[7]
  • 0.262±0.057[6]
SMASS = K [3]
10.8[1][3]

    Orbit and classification

    Scania is a non-family asteroid from the main belt's background population.[5] It orbits the Sun in the central asteroid belt at a distance of 2.4–3.0 AU once every 4 years and 6 months (1,637 days; semi-major axis of 2.72 AU). Its orbit has an eccentricity of 0.11 and an inclination of 5° with respect to the ecliptic.[3] The body's observation arc begins at Vienna Observatory on 25 October 1900, three nights after its official discovery observation at Heidelberg.[1]

    Naming

    This minor planet was named after the Swedish region of Scania or Skåne by its Latin name, on the occasion of a meeting held in Lund by the Astronomische Gesellschaft in 1904 (AN, 166, 207). The naming was also mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 50).[2]

    Physical characteristics

    In the Bus–Binzel SMASS classification, Scania is an uncommon K-type asteroid.[3]

    Rotation period

    In December 2017, a rotational lightcurve of Scania was obtained from photometric observations by Frederick Pilcher. Lightcurve analysis gave a well defined rotation period of 164.1±0.1 hours with a brightness variation of 0.37±0.03 magnitude (U=3). The results supersedes previous observations.[10][11]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Scania measures between 19.689 and 23.58 kilometers in diameter and its surface has an albedo between 0.189 and 0.262.[6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.1808 and a diameter of 21.63 kilometers based on an absolute magnitude of 10.8.[10]

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    References
    1. "460 Scania (A900 UF)". Minor Planet Center. Retrieved 11 March 2020.
    2. Schmadel, Lutz D. (2007). "(460) Scania". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 52. doi:10.1007/978-3-540-29925-7_461. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 460 Scania (A900 UF)" (2020-01-31 last obs.). Jet Propulsion Laboratory. Retrieved 11 March 2020.
    4. "Asteroid 460 Scania – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 11 March 2020.
    5. "Asteroid 460 Scania". Small Bodies Data Ferret. Retrieved 11 March 2020.
    6. Mainzer, A. K.; Bauer, J. M.; Cutri, R. M.; Grav, T.; Kramer, E. A.; Masiero, J. R.; et al. (June 2016). "NEOWISE Diameters and Albedos V1.0". NASA Planetary Data System. Bibcode:2016PDSS..247.....M. Retrieved 11 March 2020.
    7. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 11 March 2020.
    8. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 11 March 2020. (online, AcuA catalog p. 153)
    9. Pilcher, Frederick; Benishek, Vladimir (July 2018). "Rotation Determination for 460 Scania" (PDF). Minor Planet Bulletin. 45 (3): 242. Bibcode:2018MPBu...45..242P. ISSN 1052-8091.
    10. "LCDB Data for (460) Scania". Asteroid Lightcurve Database (LCDB). Retrieved 11 March 2020.
    11. Behrend, Raoul. "Asteroids and comets rotation curves – (460) Scania". Geneva Observatory. Retrieved 11 March 2020.
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